Well, I Guess I have been away from the Forums WAY too Long!
 
I Just purchased Two GTX 780 Classifieds to replace My Four 560 Ti Classified 448 cores that I had running in 4-Way SLI on my 762 4X SLI Classified MB in the Hopes of buying Two more 780's to have 4-Way SLI Once again like the Last Three 4-Way Setups I have had in the Past, But it Looks like I (We) have been thrown a "Curve Ball"  by EVGA/NVIDIA!
 
The Only POSITIVE's about this is the Fact that I have Only purchased TWO GTX 780 Classifieds so far and not FOUR, Plus the fact that I will NOT be buying Four TITAN's Just to be able to use 4-Way SLI!!
 
EVGA......All I have to Say is This has SEVERELY changed my Mind about Your Products! 
 
PS: Thank GOD I Didn't Buy the Four GTX 780 Classified Hydro Coppers!

Well I'm glad you were spared! I bought them when it was still being advertised as 4 way and had no reason to imagine nvidia would yank it after it having been part of the gtx line for years now just cause they decided gtx was no longer flagship, now titan was/is.
 
they don't know what they're doing. It constantly changes so long as they can make more money! Look at the 780ti kpe. Their has been soooo many versions of the Kepler cards it will make your head spin! Of course the drivers still don't function properly with nvidia tech like SLI and surround the they're launching another to drain the last bit they can from the 700 series since 800 is right around the corner. 
Years ago I could understand why people stayed loyal to nvidia, back when a flagship gpu was 300-400 bucks. However now they jack them up every generation meanwhile cost of living wage haa stayed even or even gone down. They are at an astronomical 700 and nvidia decoded that wasn't enough so it was time for a market shift. Let's make the mainstream card 700 and the flagship/enthusiast line 1000+! 
 
Maybe nezt year we will see a 1200 dollar gtx titan ultra! More than a tv now for a single gpu! Meanwhile they have mods and csrs that ignore pms and post once a week at best on their forums.  They need to take a queue from you guys (evga) in that regard. Let's be real, I spent enough on my graphics solution to pay a dozen mods for a week ffs.
 
anyhow, I'm getting off topic. Just thinking aloud about how eager amds next offering has the potential to make me. They are obviously a wee bit less greedy. They release a product of just as high quality, and just as fast for half the price. Where exactly does the other half go? Not to software or customer service. What are all you loyalists paying for?
 
for now I'm spent (for awhile lol!) I'll be stuck with my four titans which garner me a massive 30fps in ffxiv due to wonky drivers and micro stutter. Quite enjoyable. My fps with one card while not as high at peak is 10x more stable/even.
 
Save yourself some $ and stress my man :p when I did run those 780s in quad , I got a higher 3dmaek score but not by as much as you would think and due to being stuck with old drivers I got worse performance in games than with one less card.
 
(I did notice u said u have tis? If so they support quad, just standard do not. That said, currently if they are anything like my titans, game performance will
be bunk on Atleast some games) 

What Older Drivers are Available that will Allow 4-Way SLI with Four GTX 780 Classifieds?

hallowen
What Older Drivers are Available that will Allow 4-Way SLI with Four GTX 780 Classifieds?

bluvert89
http://hwbot.org/newsflash/2129_simple_inf_modification_enables_4_way_sli_on_geforce_gtx_780___titan_records_in_sight

The driver and the inf file I've tested, they do not work with EVGA X79 Dark and 4 x 780 Classified. Saving you the money.